Android Notifications push php error -

i trying send notification push user, there no way complete that,

there code use in php

    $message = new gcm();      $message->sendmessagetophone(2, $message,$valor);      class gcm      {      function sendmessagetophone($collapsekey, $messagetext, $gcmcode)   {                     $apikey = 'there apikey';            $headers = array('authorization:key=' . $apikey);           $data = array(      'registration_id' => $gcmcode,      'collapse_key' => $collapsekey,      'data.message' => $messagetext);          $ch = curl_init();           curl_setopt($ch, curlopt_url, "https://android.googleapis.com/gcm/send");           if ($headers)     curl_setopt($ch, curlopt_httpheader, $headers);           curl_setopt($ch, curlopt_ssl_verifypeer, false);            curl_setopt($ch, curlopt_post, true);           curl_setopt($ch, curlopt_returntransfer, true);           curl_setopt($ch, curlopt_postfields, $data);          $response = curl_exec($ch);            $httpcode = curl_getinfo($ch, curlinfo_http_code);            if (curl_errno($ch)) {     return 'fail';    }              if ($httpcode != 200) {     return 'status code 200';    }            curl_close($ch);             return $response;       } 

and error when execute php

catchable fatal error: object of class gcm not converted string in /path/gcm.php on line 25

line 25 = curl_setopt($ch, curlopt_postfields, $data);

hi friend had develop push notification part bundle on symfony 2.x use class , change namespaces, add key, hope it's you. , i'm sorry bad english.

remember id of device has registered in cloud.

from controller:

    /*      * google api key      */     define("google_api_key", "xxxxxxxxxxxxxx"); // place google api key     $gcm = new \messagebundle\classes\gcm();      $message = "hello"; $registatoin_ids = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; $gcm->send_notification($registatoin_ids, $message); 

the class:

    <?php   /**  * gcm  *  * @author esteban lopez  */ class gcm {       // constructor     function __construct() {      }      /**      * sending push notification      */     public function send_notification($registatoin_ids, $message) {          // set post variables         $url = 'https://android.googleapis.com/gcm/send';          $fields = array(             'registration_ids' => $registatoin_ids,             'data' => $message,         );          $headers = array(             'authorization: key=' . google_api_key,             'content-type: application/json'         );         // open connection         $ch = curl_init();          // set url, number of post vars, post data         curl_setopt($ch, curlopt_url, $url);          curl_setopt($ch, curlopt_post, true);         curl_setopt($ch, curlopt_httpheader, $headers);         curl_setopt($ch, curlopt_returntransfer, true);          // disabling ssl certificate support temporarly         curl_setopt($ch, curlopt_ssl_verifypeer, false);          curl_setopt($ch, curlopt_postfields, json_encode($fields));          // execute post         $result = curl_exec($ch);         if ($result === false) {             die('curl failed: ' . curl_error($ch));         }          // close connection         curl_close($ch);        // echo $result;     }  }